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~~ f <br />LAFARGE <br />NORTH AMERICA <br />AGGREGATES, CONCRETE <br />& ASPHALT <br />C'nn~v <br />August 7, 2006 <br />Chris Rowe <br />,~1J Colorado Division of Minerals and Geology <br />1313 Sherman Street <br />Denver, Colorado 80203 <br /> <br />Re: Technical Revisi~or Permit No. M-1986-079 - M&G Pit <br />~--- <br />Dear Mr, Rowe, <br />Lafarge requests a Technical Revision (TR-6) to the Reclamation Permit No. M-1986-079 for the <br />M&G Pit in Adams County. <br />TR-5, approved August 10, 2005, allows the backfill of exposed groundwater area to two feet <br />above water line within a designated lake of approximately 8.85 acres. Lafarge requests that the <br />location of the area to be filled be adjusted to the northern end of the permit area to address <br />changes in surface water location. The attached map depicts both the azea approved for backfill <br />in 2005 and the new, equal area proposed by Lafarge. <br />The source of the backfill material will be overburden and other clean and inert materials such as <br />washed fines from nearby sand and gravel pits. The fill material will be essentially the same as <br />that approved with TR-5 and the backfill will be placed in a manner to meet the requirements of <br />3.1.5(2) of the Construction Materials Rules. Information and affidavit to address the <br />requirements of Rule 3.1.5 (9) (a) through (f) will be provided separately. <br />Mining is complete at this pit and no additional mining will take place. The financial warranty <br />should remain the same as that provided in 2005 as no additional work is proposed and the <br />warranty calculations were made less than one yeaz ago. Lafarge has also secured the necessary <br />local approvals required to complete the reclamation from Adams County. <br />If you have any questions, please contact me at 303-657-4054. Thank you. <br />Sincerely, <br />~~ <br />Steven T. Brown, AICP <br />Land Planner <br />Enclosure <br />LAFARGE WEST, INC. <br />10170 Church Ranch Way, Westminster, CO 80021 <br />Office: (303) 657-4000 Fax: (303) 657-4037 <br />~~/RECElVED <br />~(L"~ ~/ AUG 0 91006 <br />Division of Reclamation, <br />Mining and Safety <br />